456 lines
11 KiB
C
456 lines
11 KiB
C
/*
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Copyright 2018 Mattia Dal Ben <matthewdibi@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include "wait.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "split_util.h"
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#include "pro_micro.h"
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#include "config.h"
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#include "timer.h"
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#ifdef USE_I2C
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# include "i2c.h"
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#else // USE_SERIAL
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# include "serial.h"
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#endif
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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#if (DEBOUNCING_DELAY > 0)
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static uint16_t debouncing_time;
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static bool debouncing = false;
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#endif
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#if (MATRIX_COLS <= 8)
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# define print_matrix_header() print("\nr/c 01234567\n")
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# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
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# define matrix_bitpop(i) bitpop(matrix[i])
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# define ROW_SHIFTER ((uint8_t)1)
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#else
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# error "Currently only supports 8 COLS"
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#endif
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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#define ERROR_DISCONNECT_COUNT 5
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#define ROWS_PER_HAND (MATRIX_ROWS/2)
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static uint8_t error_count = 0;
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static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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#if (DIODE_DIRECTION == COL2ROW)
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static void init_cols(void);
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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static void unselect_row(uint8_t row);
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#elif (DIODE_DIRECTION == ROW2COL)
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static void init_rows(void);
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static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
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static void unselect_cols(void);
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static void unselect_col(uint8_t col);
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static void select_col(uint8_t col);
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#endif
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__attribute__ ((weak))
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void matrix_init_kb(void) {
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matrix_init_user();
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}
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__attribute__ ((weak))
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void matrix_scan_kb(void) {
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matrix_scan_user();
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}
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_user(void) {
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}
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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debug_enable = true;
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debug_matrix = true;
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debug_mouse = true;
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// initialize row and col
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unselect_rows();
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init_cols();
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TX_RX_LED_INIT;
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix_init_quantum();
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}
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uint8_t _matrix_scan(void)
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{
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int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
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#if (DIODE_DIRECTION == COL2ROW)
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// Set row, read cols
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for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
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# if (DEBOUNCING_DELAY > 0)
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bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
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if (matrix_changed) {
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debouncing = true;
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debouncing_time = timer_read();
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PORTD ^= (1 << 2);
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}
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# else
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read_cols_on_row(matrix+offset, current_row);
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# endif
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}
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#elif (DIODE_DIRECTION == ROW2COL)
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// Set col, read rows
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for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
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# if (DEBOUNCING_DELAY > 0)
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bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
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if (matrix_changed) {
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debouncing = true;
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debouncing_time = timer_read();
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}
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# else
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read_rows_on_col(matrix+offset, current_col);
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# endif
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}
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#endif
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# if (DEBOUNCING_DELAY > 0)
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if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
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for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
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matrix[i+offset] = matrix_debouncing[i+offset];
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}
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debouncing = false;
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}
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# endif
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return 1;
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}
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#ifdef USE_I2C
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// Get rows from other half over i2c
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int i2c_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
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if (err) goto i2c_error;
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// start of matrix stored at 0x00
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err = i2c_master_write(0x00);
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if (err) goto i2c_error;
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// Start read
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err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
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if (err) goto i2c_error;
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if (!err) {
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int i;
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for (i = 0; i < ROWS_PER_HAND-1; ++i) {
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matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
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}
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matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
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i2c_master_stop();
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} else {
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i2c_error: // the cable is disconnceted, or something else went wrong
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i2c_reset_state();
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return err;
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}
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return 0;
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}
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#else // USE_SERIAL
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int serial_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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if (serial_update_buffers()) {
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return 1;
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}
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = serial_slave_buffer[i];
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}
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return 0;
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}
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#endif
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uint8_t matrix_scan(void)
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{
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uint8_t ret = _matrix_scan();
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#ifdef USE_I2C
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if( i2c_transaction() ) {
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#else // USE_SERIAL
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if( serial_transaction() ) {
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#endif
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// turn on the indicator led when halves are disconnected
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TXLED1;
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error_count++;
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if (error_count > ERROR_DISCONNECT_COUNT) {
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// reset other half if disconnected
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = 0;
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}
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}
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} else {
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// turn off the indicator led on no error
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TXLED0;
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error_count = 0;
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}
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matrix_scan_quantum();
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return ret;
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}
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void matrix_slave_scan(void) {
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_matrix_scan();
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int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
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#ifdef USE_I2C
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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i2c_slave_buffer[i] = matrix[offset+i];
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}
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#else // USE_SERIAL
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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serial_slave_buffer[i] = matrix[offset+i];
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}
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#endif
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}
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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return true;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & ((matrix_row_t)1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += bitpop16(matrix[i]);
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}
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return count;
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}
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#if (DIODE_DIRECTION == COL2ROW)
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static void init_cols(void)
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{
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for(uint8_t x = 0; x < MATRIX_COLS; x++) {
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uint8_t pin = col_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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}
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
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{
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// Store last value of row prior to reading
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matrix_row_t last_row_value = current_matrix[current_row];
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// Clear data in matrix row
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current_matrix[current_row] = 0;
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// Select row and wait for row selecton to stabilize
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select_row(current_row);
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wait_us(30);
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// For each col...
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for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
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// Select the col pin to read (active low)
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uint8_t pin = col_pins[col_index];
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uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
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// Populate the matrix row with the state of the col pin
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current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
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}
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// Unselect row
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unselect_row(current_row);
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return (last_row_value != current_matrix[current_row]);
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}
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static void select_row(uint8_t row)
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{
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uint8_t pin = row_pins[row];
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_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
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_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
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}
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static void unselect_row(uint8_t row)
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{
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uint8_t pin = row_pins[row];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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static void unselect_rows(void)
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{
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for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
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uint8_t pin = row_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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}
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#elif (DIODE_DIRECTION == ROW2COL)
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static void init_rows(void)
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{
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for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
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uint8_t pin = row_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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}
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static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
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{
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bool matrix_changed = false;
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// Select col and wait for col selecton to stabilize
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select_col(current_col);
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wait_us(30);
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// For each row...
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for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
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{
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// Store last value of row prior to reading
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matrix_row_t last_row_value = current_matrix[row_index];
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// Check row pin state
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if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
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{
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// Pin LO, set col bit
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current_matrix[row_index] |= (ROW_SHIFTER << current_col);
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}
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else
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{
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// Pin HI, clear col bit
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current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
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}
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// Determine if the matrix changed state
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if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
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{
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matrix_changed = true;
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}
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}
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// Unselect col
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unselect_col(current_col);
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return matrix_changed;
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}
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static void select_col(uint8_t col)
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{
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uint8_t pin = col_pins[col];
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_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
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_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
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}
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static void unselect_col(uint8_t col)
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{
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uint8_t pin = col_pins[col];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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static void unselect_cols(void)
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{
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for(uint8_t x = 0; x < MATRIX_COLS; x++) {
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uint8_t pin = col_pins[x];
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_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
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_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
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}
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}
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#endif
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